Gearing

This really isn't a roadie question nor is it for the conversion/cafe crowd.

I try to ride the velodrome in the winter. It's indoors and works great when it's raining. When it's nice out I train on the flats of a delta about 3 feet above sea level. I find a headwind (maybe 15-20kph) either going or coming and my average speed is around 30kph with 44/15 and 165mm cranks. That works out to about 80rpm.

I just spent the morning switching back to my indoor 49/16 setup. I don't encounter too many hills other than the bridge between my city and the river delta. I'm thinking my fitness is at the level I can run 49/16 outside in the wind/bridges/etc.

Is 80rpm too early an average cadence to switch up on a single speed? Should I be looking at an average of 90rpm to take it to the next level?

49/16 seems fine at the track. Just looking to keep my knees alive this summer.

Average speed over one hour was 30.4kph. 10kph headwind average. Cadence was 77rpm. My legs seemed to cope plus it helps to have the computer on telling you that you are slacking. Hope this is use to someone in the future.